Karl’s neglect of the IPCC data was purposeful, according to John Bates, a recently retired scientist from the National Climactic Data Center at the NOAA. Bates came forward just days ago to charge that the 2015 study selectively used misleading and unverified data — effectively putting NOAA’s thumb on the scale.
Bates said Karl was “insisting on decisions and scientific choices that maximized warming and minimized documentation… in an effort to discredit the notion of a global warming pause, rushed so that he could time publication to influence national and international deliberations on climate policy.”
For example, Karl allegedly adjusted temperature data collected by robot buoys upward to match earlier data from ocean-going ships. That was problematic, Bates said, because ships generate heat and could cause readings to vary.
“They had good data from buoys, And they threw it out and ‘corrected’ it by using the bad data from ships. You never change good data to agree with bad, but that’s what they did — so as to make it look as if the sea was warmer.”